Cuckoo sings if the hands are moved backwards, but not if they go forwards

Discussion in 'Clock Repair' started by dalgetty, Apr 17, 2017.

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  1. dalgetty

    dalgetty Registered User

    Apr 17, 2017
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    Dear Friends,

    My cuckoo clock, an Azura, has a cuckoo that sings if I move the hands backwards, or if I pull the little string which allows me to advance the hours the cuckoo sings. But if I move the hands forwards there is just a "Thunk", and the cuckoo only opens the door a tiny crack.

    You can see the mechanism in this video, where I advance the hands clockwise, then anti-clockwise:

    https://youtu.be/i9DqwKw9F84

    How can I repair it?

    Thanks for your time! (and expertise)
     
  2. Tinker Dwight

    Tinker Dwight Registered User

    Oct 11, 2010
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    I can't tell for sure but it sounds like the wheel timing is
    off such that the warning is not right, leaving the maintenance
    cam in the wrong position.
    Warning should be long enough such that the maintenance lever
    can fall back into the slot on the maintenance cam.
    We'd be better able to tell if the movement was out of the case.
    The video doesn't show much of the movement's action.
    Tinker Dwight
     
  3. shutterbug

    shutterbug Moderator

    Oct 19, 2005
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    Is this a new development or is the clock new to you? I can see that there is no warning run. What is causing that is not clear. If it's a new to you clock, it may be installed or adjusted wrong. If it's a new situation in a clock that has been acting correctly we'll have to go deeper.
     
  4. ragobo

    ragobo Registered User

    Apr 14, 2015
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    #4 ragobo, Apr 17, 2017
    Last edited: Apr 17, 2017
    A bit risky but you could try to remove the front dial, on most cases is only nailed but not glued. If you remove it you could take a video showing what's going on inside.

    Edit: I found those pictures of an azura cuckoo movement on an ebay listing. As it is endend now I think I can link them here:

    http://www.ebay.ie/itm/Vintage-Cele...ckoo-Clock-Movement-w-Bird-E566b/201422309643

    On the front side there's what looks like a lever with a spring. Just blindly guessing but it could be the spring on your movement (if it's like the one pictured) may be loose and only when you move the minute hand backwards the lever is forced down...as said just blindly guessing.
     
  5. Tinker Dwight

    Tinker Dwight Registered User

    Oct 11, 2010
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    It is not likely to show much behind the dial. This
    is a count wheel, not a rack and snail.
    It is better to remove the movement.
    Tinker Dwight
     
  6. dalgetty

    dalgetty Registered User

    Apr 17, 2017
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    thanks for all of this advice - I will try to remove the movement and post another video

    the clock has worked until this year, I am determined to get it going again
     
  7. Tinker Dwight

    Tinker Dwight Registered User

    Oct 11, 2010
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    You will need to remove the flutes first. Use some string and tie the bellows
    closed so you don't tear the bellows.
    They are usually attached with one screw
    and a small brad. Remove the screw and then us a knife to pry it off the brad.
    Carefully unhook the lifting wire.
    Tinker Dwight
     
  8. Chris D

    Chris D Donor

    Sep 8, 2009
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    Does the minute hand turn very easily? Only thing I can think of is that the spring clutch is 'loose' and doesn't have enough tension.
     
  9. dalgetty

    dalgetty Registered User

    Apr 17, 2017
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    Dear Friends,

    I removed the movement from the case - I've never done anything like that in my life before !

    Here is the movie where I show the backwards action - which cause the cuckoo to sing, and the forwards action, which does not, from several angles:
    https://youtu.be/a2qCHYGBzng

    Thanks again for your time and expertise
     
  10. Tinker Dwight

    Tinker Dwight Registered User

    Oct 11, 2010
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    #10 Tinker Dwight, Apr 18, 2017
    Last edited: Apr 19, 2017
    I noticed that when going forward, the count lever popped up.
    It shouldn't catch. It should lift smoothly and go into warning.
    When it falls after passing the hour it should start the strike.
    I've never seen one quite like this movement but it is a count
    wheel clock most all run on the same principles.
    The wire to follow the cam is a little unusual.
    I'd like to see the front of the movement when it makes a complete
    pass. It is not interesting to see you back it up to strike.
    It may be a symptom but we need to see the front when it completes
    the lift and fall of the J lever ( even if it doesn't look like a J ).
    We need to see the action when moving the hand the full 360 degree,
    not just till warning.
    It also looks like you may have some other timing issues as the hammer shouldn't
    move when going into warning.
    Tinker Dwight
     
  11. dalgetty

    dalgetty Registered User

    Apr 17, 2017
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  12. Tinker Dwight

    Tinker Dwight Registered User

    Oct 11, 2010
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    Can view the youtube. You need to change the privilege level.
    Tinker Dwight
     
  13. dalgetty

    dalgetty Registered User

    Apr 17, 2017
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    Sorry, I think it should be OK now - it should be unlisted, but visible
     
  14. THTanner

    THTanner Registered User

    Jul 3, 2016
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    The youtube runs fine now, but I cannot tell what is wrong - cuckoos such as yours are not something I have worked on.

     
  15. dalgetty

    dalgetty Registered User

    Apr 17, 2017
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    Thanks for looking !
     
  16. ragobo

    ragobo Registered User

    Apr 14, 2015
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    I think what's going wrong is that the minute hand bush is not correctly syncronized. It's doing the strikes at 15 min and at 45 min. You should take the minute hand off and rotate the bush about a quarter of a turn.
     
  17. shutterbug

    shutterbug Moderator

    Oct 19, 2005
    34,172
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    It looks like it's going into warning, but not dropping out to allow the train to run. Look for a stop pin or lever either touching the fan, or the wheel under it.
     
  18. dalgetty

    dalgetty Registered User

    Apr 17, 2017
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    I'll have a look at that, contrasting the way it behaves when moving forwards and when it moves backwards

    Will keep you posted
     
  19. Tinker Dwight

    Tinker Dwight Registered User

    Oct 11, 2010
    13,680
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    The clock is going into warning but it is not starting the strike.
    The wire that is lifting at the front of the clock is most likely
    the culprit.
    Try this experiment.
    move the minute hand until the lifting lever ( the one in front )
    has just dropped.
    Push it down a little against its springiness. You should have to bend
    it. I believe it will trip the strike.
    Please report back.
    Tinker Dwight
     
  20. dalgetty

    dalgetty Registered User

    Apr 17, 2017
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    Hi Tinker,
    I just followed your instructions and that's exactly what happens!
     
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